This webmail now only services VTN users. Why? Because all of the other servers from that list now have their own webmail.
You should visit your service provider's homepage to find out where their webmail login is. Some hints:
Vancouver Community Network - webmail login is here, to the left
Powell River Community Network - webmail is here
If you had saved mail stored on our old webmail system, we kept a backup for you — you should contact firstname.lastname@example.org so we can forward it to you.